摘要
采用搅拌铸造法在真空度为200Pa的条件下制备得到含有微量氧化物的SiCp/Mg复合材料,通过显微组织观察和动态热机械分析等对其阻尼特性进行了研究。结果表明,所制备的SiCp/Mg复合材料基体晶界处分布着附着有氧化物的网状结构,且随着SiCp含量的增加,网状结构增多,且分布更加分散。此结构增大了位错密度和晶粒界面滑移,位错脱钉和界面滑移在振动过程中耗能量增大,因此所制备的SiCp/Mg复合材料具有理想的阻尼性能。
The SiCp/Mg composites material with oxides were prepared by stir casting method under the condition of vacuum degree of 200 Pa.The damping properties were studied by means of microstructure observation and dynamic mechanical thermal analysis.The results showed that the network structure containing oxides were distributed in the SiCp/Mg matrix.Meanwhile,with the increase of SiCp content,the network structure was more and the distribution was more dispersed.And this structure increased the dislocation density and the grain boundary slip,resulting in the increase of the energy consumption in the vibration process through dislocation breakaway from pinning points and the interface slip.Therefore,the prepared SiCp/Mg matrix composites has the ideal damping property.
作者
王云思
段东平
杨占寿
牛瑞龙
闫方甲
WANG Yun-si;DUAN Dong-ping;YANG Zhan-shou;NIU Rui-long;YAN Fang-jia(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008 China;Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources;University of Chinese Academy of Sciences,Beijing,100049 China;CAS Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing,100190 China)
出处
《盐湖研究》
CSCD
2019年第3期68-74,共7页
Journal of Salt Lake Research
基金
青海省科技厅项目,镁铝锶合金制备及相图(2013-Z-704)
